Mitochondria and Chloroplasts Are Thought to Have Evolved from Free-Living

question 5

Multiple Choice

Mitochondria and chloroplasts are thought to have evolved from free-living aerobic bacteria that were engulfed by an ancestral anaerobic cell and established a mutually beneficial (symbiotic) relationship with it. Which of the following statements is NOT true about these organelles?

• A) They are similar in size to small bacteria.
• B) They have their own circular genomic DNA.
• C) They have their own ribosomes.
• D) They have their own transfer RNAs.
• E) They are found in all eukaryotes.

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Definitions:

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